Effects of Sulfonylureas on Left Ventricular Mass in Type 2 Diabetic Patients
Resource
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY v.292 n .1 pp.H608-H613
Journal
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
Journal Volume
v.292
Journal Issue
n
Pages
H608-H613
Date Issued
2007
Date
2007
Author(s)
LEE, TSUNG-MING
LIN, MEI-SHU
TSAI, CHANG-HER
HUANG, CHEN-LING
CHANG, NEN-CHUNG
Abstract
Myocardial ATP-sensitive potassium (KATP) channels have been implicated in attenuating cardiac hypertrophy by modulating endothelin-1 concentrations. Sulfonylureas differ in their affinity for cardiac KATP channels and therefore may vary in their effects on left ventricular (LV) mass. We sought to determine the differential effects of sulfonylureas on LV mass in type 2 diabetic patients. All patients had been taking glibenclamide for more than 3 mo before being randomized to either switch to an equipotent dose of gliclazide or continue glibenclamide. A total of consecutive 240 diabetic patients were randomized into glibenclamide, gliclazide, a combination of glibenclamide and nicorandil, or gliclazide and nicorandil for 6 mo. In the gliclazide- treated group, the LV mass index was significantly decreased compared with that in the glibenclamide- treated groups. Nicorandil administration significantly reduced LV mass in glibenclamide-treated patients compared with patients treated with glibenclamide alone. Measurements of endothelin (-1) concentrations mirrored the functional status of KATP channel. Multivariate analysis revealed that regression of LV mass was significantly correlated only with the changes in endothelin-1 (P < 0.0001). Our results show that KATP channels may play a pathogenetic role, probably through an endothelin-1- dependent pathway, in diabetes mellitus-related ventricular hypertrophy. Patients treated with gliclazide may have a beneficial effect in attenuating ventricular mass .
Subjects
adenosine 5 '-triphosphate-sensitive potassium channels
diabetes mellitus
glibenclamide
gliclazid
SDGs